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Finding the Fourth Proportional to 386,035.12, 531,539.31 and 342,939.88

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Solution

The fourth proportional to 386,035.12, 531,539.31 and 342,939.88 is: 472,200.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,035.12 : 531,539.31 = 342,939.88 : x
  2. Step 2: Convert to fraction form
    386,035.12/531,539.31 = 342,939.88/x
  3. Step 3: Cross multiply
    386,035.12x = 531,539.31 × 342,939.88
  4. Step 4: Simplify right side
    386,035.12x = 182,286,027,186.68
  5. Step 5: Solve for x
    x = 182,286,027,186.68/386,035.12
  6. Step 6: Final answer
    x = 472,200.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.